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12.73 ct Multicolor Boulder Opal Gemstone, Boulder Opal Gem in Trillion Cabochon Shape for Sale.
Photos are of Actual Product for Sale
12.73 ct Multicolor Boulder Opal Stone, Natural Boulder Opal in Trillion Cabochon Shape for Sale Boulder Opal Gemstone in 16 x 16 mm (calibrated) Size for Sale, Boulder Opal Stone in Multicolor Color

12.73ct Multicolor Boulder Opal, Trillion, 16.6x15.7 mm

9.9 out of 10
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Boulder Opal Product ID: 627858
Type: Boulder Opal
Boulder Opal Weight: 12.73 ct Boulder Opal 1 gem
Boulder Opal Size: 16 x 16 mm calibrated Boulder Opal
Boulder Opal Size: 16.6 x 15.7 x 6 mm Boulder Opal
Boulder Opal Exact Size: 16.60 x 15.65 x 6.00 mm
Length x Width x Depth
Boulder Opal Shape: Trillion Cabochon Boulder Opal
Boulder Opal Color: Multicolor Boulder Opal
Boulder Opal Clarity: Opaque Boulder Opal
Boulder Opal Treatment: Untreated
Boulder Opal Origin: Australia Boulder Opal
Content: 1 pc
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Product Description

This is a 12.73 carat natural multicolor Boulder Opal gem, 1 pc in trillion shape with an exact size of 16.60 x 15.65 x 6.00 mm. This loose Boulder Opal gemstone was mined in Australia and its clarity is Opaque. No treatment has been applied on this natural Boulder Opal stone

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Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
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Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
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Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
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Overall Rating -> 10 star ratings

I would recommend gem select yo everyone Fast service and no problems

Posted By Steve in March, 2025
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Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

When I need a specific stone, gem select is my go to shop. Always a good experience and a great product.

Posted By LeAnn in April, 2025
Source: Bizrate
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